Hand exerciser



FIG. 1 is a front elevational view of a hand exerciser showing my new design, the side opposite being identical;

FIG. 2 is an end elevational view thereof, the end opposite being identical;

FIG. 3 is a cross-sectional view thereof taken along line 3--3 in FIG. 1; and,

FIG. 4 is another front elevational view thereof with broken lines showing the human hand as an illustration of environment forming no part of what is claimed. 

The ornamental design for a hand exerciser, as shown and described. 